AIR TAXI ACFT DOES NOT HAVE NEW APCH PLATE WITH NEW PROC. DSNDS TOO LOW.

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WE BEGAN THE LDA 2 RWY 8 APCH TO JUNEAU; AK; FROM IAF ASORT INTXN INBOUND. WE DSNDED FROM 9000 FT TO 6500 FT AS PER APCH PLATE. ATC BEGAN DISCUSSING APCH ALTS WITH MY COPLT; EXPRESSING CONCERN WE WERE BELOW THE DESIGNATED ALT FOR THIS SEGMENT. I WAS BUSY WITH THE APCH; SLOWING THE ACFT DOWN; MAINTAINING THE PWR TO KEEP THE ANTI-ICE SYS WARM AND TRYING TO FIGURE WHAT ATC WAS TALKING ABOUT. I CLBED BACK UP TO 9000 FT; MY COPLT SAID WE WERE CORRECT ON THE APCH; BUT HE WAS GETTING CONFUSED TRYING TO MONITOR THE APCH PLATE; DO THE LNDG CHKLIST; AND DISCUSS WITH ATC THE PROCS. ATC WOULD NOT LET UP IN THEIR CONTINUOUS DISCUSSION WITH US. I HAVE BEEN TO JUNEAU MANY TIMES AND AM VERY FAMILIAR WITH THIS APCH (IF I HADN'T BEEN; WE WOULD HAVE MISSED AND HELD SOMEPLACE TO DISCUSS IT FURTHER). THEREFORE; I DIRECTED MY COPLT TO TELL ATC TO BE QUIET AND WE WOULD CONTACT HIM ON THE GND. OUR DISCUSSION ON THE GND REVEALED THAT A NEW APCH PLATE HAD JUST GONE INTO EFFECT 1 WK PRIOR. THIS IS A SPECIAL PLATE NOT SENT WITH NORMAL REVISIONS. THE PLATE IS SENT TO A DIFFERENT PERSON AT THE 135 OPERATOR I WORK FOR; THAN WHERE NORMAL REVISIONS ARE SENT. RECOMMENDATION: NEED TO SEND SPECIAL PLATES WITH NORMAL REVISIONS OR WE NEED TO HAVE A BETTER PROC ON DISTRIBUTING SPECIAL PLATES IN A TIMELY MANNER. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THE LDA 2 APCH IS A SPECIAL APCH PLATE AND PLT MUST BE AUTH TO USE IT. IT REQUIRES SPECIAL TRAINING INTO JNU ARPT. RPTR CALLED AND TALKED TO ATC AFTER THE LNDG AND LEARNED ABOUT THE NEW APCH PROC. IT WAS VERY DISTRACTING TO HAVE ATC TALKING TO FO WHO WAS NOT ABLE TO ASSIST RPTR AS NEEDED. DUE TO ICING; PWR HAD TO BE KEPT UP IN ORDER FOR DEICING EQUIP TO WORK PROPERLY. THIS REQUIRED POPPING SPD BRAKES AND MONITORING AIRSPD TO MAINTAIN ALT AND IT WAS A 1-MAN COCKPIT. NOT GOOD.